Low Cost/ Low Power CMOS General-Purpose Dual Analog Front End
a
Low Cost, Low Power CMOS General-Purpose Dual Analog Front End AD73322
FUNCTIONAL BLOCK DIAGRAM
AVDD1 AVDD2 DVDD
FEA...
Description
a
Low Cost, Low Power CMOS General-Purpose Dual Analog Front End AD73322
FUNCTIONAL BLOCK DIAGRAM
AVDD1 AVDD2 DVDD
FEATURES Two 16-Bit A/D Converters Two 16-Bit D/A Converters Programmable Input/Output Sample Rates 78 dB ADC SNR 77 dB DAC SNR 64 kS/s Maximum Sample Rate –90 dB Crosstalk Low Group Delay (25 s Typ per ADC Channel, 50 s Typ per DAC Channel) Programmable Input/Output Gain Flexible Serial Port which Allows Up to Four Dual Codecs to be Connected in Cascade Giving Eight I/O Channels Single (+2.7 V to +5.5 V) Supply Operation 73 mW Typ Power Consumption at 3.0 V On-Chip Reference 28-Lead SOIC and 44-Lead LQFP Packages APPLICATIONS General Purpose Analog I/O Speech Processing Cordless and Personal Communications Telephony Active Control of Sound and Vibration Data Communications Wireless Local Loop GENERAL DESCRIPTION
AD73322
VFBP1 VINP1 VINN1 VFBN1 VOUTP1 VOUTN1 REFOUT REFCAP VFBP2 VINP2 VINN2 VFBN2 VOUTP2 VOUTN2 ADC CHANNEL 1 SDI SDIFS
DAC CHANNEL 1 SPORT REFERENCE
SCLK SE RESET
ADC CHANNEL 2
MCLK
SDOFS DAC CHANNEL 2 SDO
AGND1
AGND2
DGND
The AD73322 is a dual front-end processor for general-purpose applications including speech and telephony. It features two 16-bit A/D conversion channels and two 16-bit D/A conversion channels. Each channel provides 77␣ dB signal-to-noise ratio over a voiceband signal bandwidth. It also features an input-tooutput gain network in both the analog and digital domains. This is featured on both codecs and can be used for im...
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